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2 * IS-IS Rout(e)ing protocol - isis_constants.h
4 * Copyright (C) 2001,2002 Sampo Saaristo
5 * Tampere University of Technology
6 * Institute of Communications Engineering
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public Licenseas published by the Free
10 * Software Foundation; either version 2 of the License, or (at your option)
13 * This program is distributed in the hope that it will be useful,but WITHOUT
14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 #ifndef ISIS_CONSTANTS_H
24 #define ISIS_CONSTANTS_H
27 * Architectural constant values from p. 35 of ISO/IEC 10589
30 #define MAX_NARROW_LINK_METRIC 63
31 #define MAX_NARROW_PATH_METRIC 1023
32 #define MAX_WIDE_LINK_METRIC 0x00FFFFFF /* RFC4444 */
33 #define MAX_WIDE_PATH_METRIC 0xFE000000 /* RFC3787 */
35 #define INTRADOMAIN_ROUTEING_SELECTOR 0
36 #define SEQUENCE_MODULUS 4294967296
38 #define ISO9542_ESIS 0x82
39 #define ISO10589_ISIS 0x83
42 * implementation specific jitter values
45 #define IIH_JITTER 10 /* % */
46 #define MAX_AGE_JITTER 5 /* % */
47 #define MAX_LSP_GEN_JITTER 5 /* % */
48 #define CSNP_JITTER 10 /* % */
49 #define PSNP_JITTER 10 /* % */
51 #define RANDOM_SPREAD 100000.0
59 * ISO - 10589 Section 7.3.21 - Parameters
63 #define ZERO_AGE_LIFETIME 60
64 #define MIN_LSP_LIFETIME 350
65 #define MAX_LSP_LIFETIME 65535
66 #define DEFAULT_LSP_LIFETIME 1200
68 #define MIN_MAX_LSP_GEN_INTERVAL 1
69 #define MAX_MAX_LSP_GEN_INTERVAL 65235
70 #define DEFAULT_MAX_LSP_GEN_INTERVAL 900
72 #define MIN_MIN_LSP_GEN_INTERVAL 1
73 #define MAX_MIN_LSP_GEN_INTERVAL 120 /* RFC 4444 says 65535 */
74 #define DEFAULT_MIN_LSP_GEN_INTERVAL 30
76 #define MIN_LSP_TRANS_INTERVAL 5
78 #define MIN_CSNP_INTERVAL 1
79 #define MAX_CSNP_INTERVAL 600
80 #define DEFAULT_CSNP_INTERVAL 10
82 #define MIN_PSNP_INTERVAL 1
83 #define MAX_PSNP_INTERVAL 120
84 #define DEFAULT_PSNP_INTERVAL 2
86 #define MIN_HELLO_INTERVAL 1
87 #define MAX_HELLO_INTERVAL 600
88 #define DEFAULT_HELLO_INTERVAL 3
90 #define MIN_HELLO_MULTIPLIER 2
91 #define MAX_HELLO_MULTIPLIER 100
92 #define DEFAULT_HELLO_MULTIPLIER 10
94 #define MIN_PRIORITY 0
95 #define MAX_PRIORITY 127
96 #define DEFAULT_PRIORITY 64
98 /* min and max metric varies by new vs old metric types */
99 #define DEFAULT_CIRCUIT_METRIC 10
101 #define METRICS_UNSUPPORTED 0x80
103 #define MINIMUM_SPF_INTERVAL 1
105 #define ISIS_MAX_PATH_SPLITS 64
111 #define NLPID_IPV6 142
112 #define NLPID_SNAP 128
113 #define NLPID_CLNP 129
114 #define NLPID_ESIS 130
117 * Return values for functions
120 #define ISIS_WARNING 1
122 #define ISIS_CRITICAL 3
125 * IS-IS Circuit Types
130 #define IS_LEVEL_1_AND_2 3
132 #define SNPA_ADDRSTRLEN 18
133 #define ISIS_SYS_ID_LEN 6
134 #define ISIS_NSEL_LEN 1
135 #define SYSID_STRLEN 24
140 #define LSPBIT_P 0x80
141 #define LSPBIT_ATT 0x78
142 #define LSPBIT_OL 0x04
143 #define LSPBIT_IST 0x03
146 * LSP bit masking macros
147 * taken from tcpdumps
151 #define ISIS_MASK_LSP_OL_BIT(x) ((x)&0x4)
152 #define ISIS_MASK_LSP_IS_L1_BIT(x) ((x)&0x1)
153 #define ISIS_MASK_LSP_IS_L2_BIT(x) ((x)&0x2)
154 #define ISIS_MASK_LSP_PARTITION_BIT(x) ((x)&0x80)
155 #define ISIS_MASK_LSP_ATT_BITS(x) ((x)&0x78)
156 #define ISIS_MASK_LSP_ATT_ERROR_BIT(x) ((x)&0x40)
157 #define ISIS_MASK_LSP_ATT_EXPENSE_BIT(x) ((x)&0x20)
158 #define ISIS_MASK_LSP_ATT_DELAY_BIT(x) ((x)&0x10)
159 #define ISIS_MASK_LSP_ATT_DEFAULT_BIT(x) ((x)&0x8)
163 /* we need to be aware of the fact we are using ISO sized
164 * packets, using isomtu = mtu - LLC_LEN
167 ((if_is_broadcast((C)->interface)) ? (C->interface->mtu - LLC_LEN) \
168 : (C->interface->mtu))
174 #endif /* ISIS_CONSTANTS_H */